If tank runs dry, it will continue to cycle on and off as the thermostat will now sense the air temperature. However, it will only cycle on for about 30 seconds, then shut off again for awhile. Unit should not be allowed to operate in a dry tank.

You cannot control the temperature. It turns on and off automatically based upon the internal thermostat setting. It turns on approximately 35 degree water temperature. Then the heater will heat up and shut off automatically. It won't turn back on again until it cools back to around 35 degrees F.

Please see the manufacturer's response as follows. All of our tank deicers are thermostatically controlled. The unit will turn on when the water temperature around the heating element is at 35° F and will normally turn off when the water temperature in the specific application is at 45° F (at -10° F outside temperature.) If the air temperature is greater than -10° F, then the water temperature may be a little warmer than 45° F before shutting off. We cannot provide any more specific information on the function of the thermostat as it considered private company information.

12.5 amps

It is not recommended

The use of H-429 in 70 gallons of water may be acceptable in some zones when the weather is extremely harsh. As the long as the unit is installed per the “Consumer Information Sheet” and always submerged in water, it will be safe to use.

It 1500 watts, approx. 12.5 amps.

It will depend upon the cost/kilowatt hour that your electric company charges and how many hours per day the unit runs. For example, this is a 1500 watt unit so it uses 1.5 kilowatts. If your electricity cost is $.10/kwh and the unit ran for 8 hours/day, your daily cost would be $1.20 (1.5 x $.10 x 8).